Headphone Cord pulled by GHOST?

During an investigation, I felt a cord being tugged. We caught the last part of it on film, as the cord seems to move up then the lines cross each other, then go back again. Not sure what caused it. Only me and one other investigator are in the room and you see my free hand, and the hand with the audio recorder. You also see the other investigator's free hand when he waves it in front of the camera as the cord moves on it's own. You be the judge. This is authentic footage and not edited in any way except to slow it down for you to see.